Ball valve stem leak

I installed a 3/4" sweat ball valve as part of my plumbing project. After turning the water on there were no leaks for at least several hours.

Now there is a very slow leak (drip) around the stem on the valve. It looks like there is a male threaded insert with hex flats below the valve handle which I could access by removing the nut holding the handle in place.

Can I remove the valve handle and tighten this insert to stop the leak? (similar to tightening the packing nut on a gate valve)

If the valve is bad I'm in a pickle because I don't have much room to work with if I have to remove it and sweat in a new one.

Thanks for the info. I am breathing a big sigh of relief that there will be an easy fix. I'll do it tonight.

The thin wrench would be nice. Maybe some QC too. This is a brand new Hammond 600psi valve from a plumbing supply house (not some cheapy from a big box or discount store). I guess it could get jarred loose in shipping, but I kind of expect the thing not to leak when it is fresh out of the box new.

Sounds like I may be too hard on them if this is a common problem though.

I replaced a leakey shutoff gate valve with a ball valve from Lowes. Once I sweat on the new valve I found it to be leaking from the stem. I removed it tonight and installed a new valve, same brand, American Valve from Lowes, and it's also leaking from the stem.

I've sweat soldered ball valves in the past (other brands) without any problems. Is it possible that I'm responsible for this failure somehow, or are these cheaply made, defective parts?

Is there anyway to fix this, like possibly tightening the nut under the handle, or must the valve be replaced?

I removed the handle and tightened the nut and that seems to have fixed the leak. Given the "cheapness" factor, should I still worry about this valve or should I leave well enough alone since it's functioning properly now?

RUGGED fergot "Apollo" valves...my personal favorite, Watts 'er good too.
As for the packing nut you tightened..it's good...for now.
In time you'll see it drip again...I'll second what Rugged said...HD and Lowes carry the cheapest of the cheap.
why not?...most homeowners don't know that.

They are red handled and give it 3 years after they've been installed, they will start cancering out on the outside of the valves.

Legend makes a good valve, along with hammond. I tried my luck at some proplus valves recently and the brass of the ball valve is solid, but the threaded stud of the ball valve is fragile and if you overtighten too much, it strips the threads out too easily.

HELP! How do I actually adjust this stem in the ball valve to stop the leak

I found this forum by searching for leaking ball valve. I"m desperate to fix this valve instead of replacing it if possible. I just spent a long time soldering the joints all around it and add the fact that it is my main shut off for my house now I would have to call the city to turn the water off again to do the work over.

So if this stem behind the handle on the valve is indeed adjustable and could be the solution to this leak can someone please help me figure out how to actually adjust it. It may seem obvious to most but not me. All my channel lock pliers are too big to get in behind the actual handle.

1. Hold the handle steady as you unscrew the locknut holding the handle on. Otherwise the handle may turn with the wrench.

2. Only tighten the packing nut under the handle enough so that you can open and close the valve without it leaking. Tightening it more than that simply causes the packing material to wear down faster than necessary.

3. The ball valve handle will look something like this:

Note that the hole in the handle for the ball valve stem isn't round, but a slot. The end of the ball valve's stem will be the same shape, and that can make it easy to misthread the lock nut when putting the handle back on.

(If you have trouble getting the lock nut back on and you do end up screwing up the thread on the end of the stem, don't sweat it. Just hang the handle to the water supply pipe near that valve with a piece of wire or something and use the handle to open and close the valve when necessary.)

4. The valve is open when the handle is parallel to the pipe and closed when the handle is perpendicular to the pipe.

5. Always ensure ball valves are OPEN when soldering them in, and give them plenty of time to cool down before operating the valve.

Actually, on a 45, halfway open is better, because some valves have water inside from testing and the heat of soldering can turn it to steam and "blow" out the seals. Halfway open lets pressure escape from both sides of the seals.

I'm a complete amateur but this subject seems somewhat related to my problem.

I have a Legend S-1100 Ball Valve that shuts the water off to the sprinkler system on the opposite side of the wall outside.
The problem is there is a leak through the valve itself, as when I open that little brass cap right next to the valve (to let the water drain out of the pipe between the valve and the back flow preventer valve outside), it continues to drip.
So, it's not shutting off completely, allowing a small amount of water (a drip about every 5 seconds) to flow through the pipe.

Unfortunately this ball valve has no packing nut! Nothing to tighten except the nut that holds the handle on and I have no idea what to do now.
Is it too old? Do I need to replace it completely? I don't have all the tools to do that, so I was hoping there was something I'm missing.

Have you pulled the handle and looked to see if there is a bonnet nut under there somewhere?
From deleted post above. Terry

Click to expand...

If I'm understanding his observation, it's not leaking around the handle, it's leaking through the seal on the valve itself as evidenced by there being water coming out the drain hole. If so, then the valve itself is worn out or defective.

But, if the backflow preventer wasn't working properly, any water in the sprinkler system could drain back and have a drip there for quite awhile unless you blew out the lines with an air compressor.

If I'm understanding his observation, it's not leaking around the handle, it's leaking through the seal on the valve itself as evidenced by there being water coming out the drain hole. If so, then the valve itself is worn out or defective.

But, if the backflow preventer wasn't working properly, any water in the sprinkler system could drain back and have a drip there for quite awhile unless you blew out the lines with an air compressor.

Click to expand...

For some reason I do not see Terry's reply in the thread, so I didn't know he asked that question.
Sorry about that.

Yes, it's leaking out of the drain hole, not the handle (though I did remove the handle and there is absolutely nothing to adjust or grab onto under there).
It's interesting to learn that, while ball valves may be more reliable, they are pretty much unrepairable when they do go, as compared to other valve types.
Is this a correct assumption?

I suppose if I were more handy this wouldn't be so much of an issue

Thanks for the help!

edit
btw, it is a brand new Febco back flow preventer, and I did notice last year that the drip was still happening even after blowing out the lines, so it must be the shut off valve.